# US 2016/0259233 A1 · Light source apparatus and projector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0259233 A1 - Document ID: US20160259233A1 - Status: Published application - Kind: A1 - Application number: 15/057,710 - Filed: 2016-03-01 - Published: 2016-09-08 - Earliest claimed: 2015-03-06 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Takahiro MIYATA; Masahiro SAITO; Satoru NAGAREKAWA - Web page: https://patentgrep.com/patent/US20160259233A1 ## CPC - G03B 21/16: Cooling; Preventing overheating - G03B 21/2026: {Gas discharge type light sources, e.g. arcs} - G03B 21/145: {Housing details, e.g. position adjustments thereof} - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) ## Abstract A light source apparatus includes a light source, a light source enclosure that accommodates the light source and has a plurality of openings formed therein in a circumferential direction around an optical axis of the light source, a channel having an introduction port through which air is introduced from outside of the light source enclosure, the channel allowed to communicate with the plurality of openings, and an opening/closing mechanism that rotates around the optical axis to selectively open and close the plurality of openings, and the opening/closing mechanism has an opening/closing section that opens and closes the plurality of openings in a first posture in which the optical axis extends along a horizontal plane in such a way that upper openings located on a vertically upper side are open and at least part of lower openings located on a vertically lower side is closed. ## Claims ### Claim 1 A light source apparatus comprising: a light source; a light source enclosure that accommodates the light source and has a plurality of openings formed therein in a circumferential direction around an optical axis of the light source; a channel having an introduction port through which air is introduced from outside of the light source enclosure, the channel allowed to communicate with the plurality of openings; and an opening/closing mechanism that rotates around the optical axis to selectively open and close the plurality of openings, wherein the opening/closing mechanism has an opening/closing section that opens and closes the plurality of openings in a first posture in which the optical axis extends along a horizontal plane in such a way that upper openings located on a vertically upper side are open and at least part of lower openings located on a vertically lower side is closed. ### Claim 2 (depends on 1) The light source apparatus according to claim 1, wherein the light source enclosure has a support section having a cylindrical shape around the optical axis and a wall section that protrudes from the support section and has the plurality of openings formed therein, the opening/closing section has an opening/closing body having an annular shape through which the support section is inserted, the opening/closing body has a first air vent that opens the upper openings in the first posture, and the opening/closing mechanism is rotatably supported by the support section with the support section inserted through the opening/closing body. ### Claim 3 (depends on 2) The light source apparatus according to claim 2, further comprising a duct member that forms, along with the light source enclosure, the channel, wherein the opening/closing mechanism is disposed between the duct member and the wall section. ### Claim 4 (depends on 2) The light source apparatus according to claim 2, wherein the opening/closing mechanism further includes a plurality of rotary members that protrude from an inner circumferential edge of the opening/closing body and are each supported by the opening/closing body rotatably around the a central axis parallel to the optical axis, and the opening/closing mechanism rotates with the plurality of rotary members in contact with the support section. ### Claim 5 (depends on 4) The light source apparatus according to claim 4, wherein the opening/closing mechanism includes a weight disposed in the opening/closing body and on the opposite side of the optical axis facing away from the first air vent. ### Claim 6 (depends on 2) The light source apparatus according to claim 2, wherein the opening/closing body has a second air vent that overlaps with the lower openings in the first posture when viewed in a direction along the optical axis, the opening/closing section includes as opening/closing assisting section that closes the second air vent in the first posture, and the opening/closing assisting section is so supported by the opening/closing body as to open the second air vent in a second posture in which the optical axis intersects a horizontal plane. ### Claim 7 (depends on 1) A projector comprising: the light source apparatus according to claim 1, a light modulator that modulates light having exited out of the light source apparatus; a projection optical apparatus that projects the light modulated by the light modulator; and a cooling fan that delivers cooling air to the light source apparatus. ### Claim 8 (depends on 2) A projector comprising: the light source apparatus according to claim 2, a light modulator that modulates light having exited out of the light source apparatus; a projection optical apparatus that projects the light modulated by the light modulator; and a cooling fan that delivers cooling air to the light source apparatus. ### Claim 9 (depends on 3) A projector comprising: the light source apparatus according to claim 3, a light modulator that modulates light having exited out of the light source apparatus; a projection optical apparatus that projects the light modulated by the light modulator; and a cooling fan that delivers cooling air to the light source apparatus. ### Claim 10 (depends on 4) A projector comprising: the light source apparatus according to claim 4, a light modulator that modulates light having exited out of the light source apparatus; a projection optical apparatus that projects the light modulated by the light modulator; and a cooling fan that delivers cooling air to the light source apparatus. ### Claim 11 (depends on 5) A projector comprising: the light source apparatus according to claim 5, a light modular or that modulates light having exited out of the light source apparatus; a projection optical apparatus that projects the light modulated by the light modulator; and a cooling fan that delivers cooling air to the light source apparatus. ### Claim 12 (depends on 6) A projector comprising: the light source apparatus according to claim 6, a light modulator that modulates light having exited out of the light source apparatus; a projection optical apparatus that projects the light modulated by the light modulator; and a cooling fan that delivers cooling air to the light source apparatus. ### Claim 13 (depends on 7) The projector according to claim 7, wherein the light source and the projection optical apparatus are so disposed as to extend along optical axes thereof that intersect each other.